Car-brake.



No. 645,486. Patented Mar. 13, I900. J. H. K. MOCOLLUM.

CAR BRAKE.

(Application filed Feb. 11, 1890.) (No Model.)

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J. H. K. MGCOLLUM.

GAR BRAKE.

(Application filed rebfu, 1899. (No Model.) 2 Sheets-Sheet 2.

No. 645,486. Patented Mar. :3. I900.

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ATENT JAMES HARRY KEIGHLY MOOOLLUM, OF TORONTO, CANADA, ASSIGNOR OFTWO-THIRDS TO REMIGIUS ELMSLEY AND VILLIAM HENRY BROUSE,

OF SAME PLACE.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 645,486, dated March13, 1900. Application filed February 11,1899. are No. 705,311. on)model.)

T 61/ whom it may concern.-

Be it known that I, JAMES HARRY KEIGHLY MCCOLLUH,electrician,of the cityof Toronto, in the county of York, in the Province of Ontario, Canada,have invented certain new and useful Improvements in Oar-Brakes, ofwhich the following is a specification.

My invention relates to improvements in car-brakes and the object of theinvention is to design a simple, cheap, and efiectual brake capable ofbeing applied in various ways with but a minimum exertion of power andloss of time; and it consists, essentially, of a sheaf secured to theaxle and provided with an encompassing strap or band, which is connectedby cable or chain to the brake-levers, against which strap a shoe,pivoted to the internal sheaf, is designed to be frictionally brought,such shoe being pivotally supported on a lever and tilted on its pivotby means of a rocking arm the bottom end of which extends into a recessin a collar, which is supported loosely on a collar on the shaft, theformer collar being engaged by brake-shoes pivotally connected tosuitable hangers, which are operated to throw in the coacting minorbrakeshoes in the manner hereinafter more particularly explained.

Figure 1 is a skeleton perspective view showing my brake mechanism. Fig.2 is a crosssection through the wheel and band. Fig. 3 is a perspectivedetail showing the mode of connection of the band to the cable of thebrake-levers. Fig. 4 is a detail of the lever and internal brake-shoe.Fig. 5 is a detail of an alternative form of rocking arm and gear. Fig.6 is a side elevation showing the manner of operating my brake whenapplied to a railway-car. Fig. 7 is a side elevation 0 showing theconstruction adopted when applied to a trailer-car.

In the drawings like letters of reference indicate corresponding partsin each figure.

A is one of the axles of the car, and B B the wheels.

O is a sheaf suitably secured on the axle, and C is a collar attached toor forming part of the sheaf O. The sheaf O is preferably formed in twoparts suitably bolted together and to the axle.

D is a strap or band which surrounds the sheaf O and has secured to itthe annular face guiding-rims D.

E is. a brake-lever which is suitably pivoted to a brace F, secured tothe bottom of the car, which bottom is not shown.

G are the brake-shoes, which are connected together by the usualcross-bar G. The crossbar G is connected by a rod G2 to the brakeleverE. A

H is a cable formed of wire rope, chain, or other suitable material,connected at one end to the brake-lever E on the opposite side of thepivot-point to that to which the rod G is connected. The opposite end ofthe cable 11 passes through a guiding-bracket H and is connected to aneye d, which straddles the joint of the strap D and extends over same.

I is a supplemental collar loosely supported on the collar O, and J is arocking arm provided with an upper double end suitably pivoted on thesheaf O and having the lower end extending into a recess i'in the collarI.

K is an arc-shaped lever pivoted on the pin 76 on the sheaf O andprovided with the shoe K, pivoted at k on the lever. The arc-shapedlever extends partially around the face of the wheel and over therocking arm, as indicated.

L L are two supplemental brake shoes which have lugs Z Z formed on themrespec- 8o tively, by which they are pivotally connected to the lowerforks of the hangers M M. The supplemental brake-shoes are located oneat each side of the axle, and the brake-shoe L is provided with anoil-cup Z which extends over the axle. The hangers M and M are pivotallyconnected at the bottom to the crossbar. The hanger M is pivoted at thetop on the pin m which extends through the double bars N and N, suitablysupported on the hot tom frame of the car. The upper end of the hanger Mis connected by the double rod 0 O and single rod 0 to the frame, thesingle rod extending through a plate 0 on the end of the double rod andhaving on its end a 5 disk 0', between which and the plate 0 extends thespiral spring 0 The hanger M is also connected by the pivoted bracket Pand the rod Q, extending through the end thereof, to the lever B,pivoted at r on a suitable portion of the frame.

The lever R is connected by the rod S to lever V, controlled by themotorman of the car, is pulled backward, thereby through the v system oflevers hereinbefore described drawing upon the hanger M, thus forcingthe shoes L and L against the collar I. The rotation of the collar isthereby retarded; but

the wheel 0, continuing to move around, the rocking arm connected to itis tilted on its pivot, thereby throwing the arc-shaped lever andbrake-shoe into engagement with the in- :o terior of the strap D, thuscausing the band to move around with the wheel and pulling upon thecable, and consequently upon the brake-lever and brake-shoes. will beunderstood that in the stopping of the still.

the lower end meshing with a gear-wheel I, attached to the collar I.band D and outside the wheel are two areshaped segments K K which arepivotally connected at k to the sheaf and are separatedat the top by thetop of the rocking arm. When the rocking arm is tilted on its pivot bymeans of the collar I being retarded by the shoes, it will be seen thatthe quadrant of .o the rocking arm J will be tilted the same as 0 mybrake mechanism hereinbefore described more particularly adapted forrailway-trains. W is a solenoid, which is one of a series throughout theseveral cars, and w is the re ciprocating core and w the wires leadingthroughout the length of the train to the several solenoids. Ordinarilythe hanger M, which in this case is really any armature, is held away,so as to keep the shoes L and L from contacting with the collar 1, bymeans 0 of thesolenoid. By means of asmall dynamo used in the engine thecurrent is supplied to the solenoids throughout the length .of thetrain, and by shifting the brushes thereon or the use of resistance inseries the current is taken from the solenoid and the rod 0 is forced bythe spring 0 so as to shift the hangers M, and thereby spring the shoesinto Inside the strap or engagement with the collar and operate thebrake mechanism hereinbefore described. Instead of using the solenoidfor keeping the hanger M and the spring for drawing the hanger close toapply the shoes they might be used vice versa.

In Fig. 7 I show my device designed to be operated in a trailer throughthe draw-bar.

X is the draw-bar, and w is a lever pivotally connected thereto and tothe lever S, identically constructed to that shown in Fig. 1. Y-

is a face ratchet-wheel formed on one of the rims of the strap or theband. The ratchetwheel Y is engaged by a pawl y, connected by a rod y,extending between the cars and to the front motor-car, where it isconnected to a crank Y, operated by a push-rod Y which may be presseddownwardly to withdraw the dog'when it is desired to release the brakeon the trailer. The operation of the brake in other respects, however,is the same 3 as when put on by the operatingrod de- It of coursescribed in Fig. 1. The draw-bar X of course takes the place of thisoperating-rod and acts car the shoes L and L will necessarily slip to isome extent as long as the brake is being ap- I plied and until the caris brought to astand- 5 in a similar manner thereto.

The double bars, which I have herein-before described, it will be seenact as a guide for 1 retaining the hangers M and H on a line with InFig. 5 I show a somewhat different form i ,o of rocking arm J, which hasa quadrant at each other and with the loose collar, so that there is nodanger of binding.

What I claim as my invention is 1. The combination with a brake shoe,brake-lever and connectingrods, of a sheaf secured to the axle, a strapcompletely encircling the sheaf and permanently of greater diameter thanthe sheaf and expanding means adapted to be moved outwardly to engagethe strap frictionally, and a cable connecting the strap to thebrake-lever, substantially as described.

on same, the cable connecting the strap to the brake-lever, the collarattached to or forming part of the sheaf, the loose collar mounted onsame and provided with a recess, the rockin g bar extending into suchrecess and means on the sheaf operated by the rocking bar forfrictionally connecting the sheaf to the strap as and for the purposespecified.

4. The combination with the brake-shoes, brake-lever andconnecting-rods, of the sheaf secured to the axle and the strap looselymounted on same and the cable connecting the ,strapto the brake-lever,the collar attached to .or forming part of the sheaf, the loose collarmounted on same and provided with a recess, the rocking bar extendinginto Such recess and the arc-shaped lever pivoted to the sheaf extendingover the rocking arm and provided with a frictional contactingbraking-surface designed tocome in contact with the strap and means forretarding the rotation of the loose collar as and for the purposespecified.

5. The combination with the brake-shoes, brake-lever and connecting-rod,the axle, the sheaf secured thereto, the strap mounted on said sheaf,the brake-lever, the cable connection between the same and the strap,the collar moving with the sheaf, the loose collar mounted thereon, therocking bar, the pivoted lever, a brake-shoe carried thereby adapted toengage said strap and a connection between the lever and the loosecollar for actuating said brake-lever to apply said brake-shoe,substantially as described. p

6. The combination with the brake-shoes, brake-lever andconnecting-rods, of the sheaf secured to the axle, and strap looselymounted on same and the cable connecting the strap to the brake-lever,the collar attached to or forming part of the sheaf, the loose collarmounted on same, the arc-shaped lever pivoted on the sheaf, providedwith a frictional contacting-surface, and designed to engage with thestrap, means connected to the loose collar for tilting the arc-shapedlever and means for retarding the rotation of the collar as and for thepurpose specified.

7. The combination with the brake-shoes, brake-lever andconnecting-rods, of the sheaf secured to the axle, and strap looselymounted on same and the cable connecting the strap to the brake-lever,the collar attached to or.

. forming part of the sheaf, the loose'collar 'mounted on same, thearc-shaped lever pivoted on the sheaf, provided with a frictionalcontacting-surface, andvdesigned to engage with the strap, meansconnected to the loose collar for tilting the arc-shaped lever, .theshoes suitably supported in proximity to the loose collar and means forthrowing them against the said collar as and for the purpose specified.

8. The combination with the brake-shoes, brake-lever andconnecting-rods, of the sheaf secured to the axle, and the strap looselymounted on same and the cable connecting the strap to the brake-leverthe collar attached to or forming part of the sheaf, the loose collarmounted on same, the arc-shaped lever pivoted on the sheaf, providedwith a frictional contacting-surface, and designed to engage with thestrap, means connected to the loose collar for tilting the arc-shapedlever, the minor shoes, the hangers both pivotally connected to theshoes and one pivotally supported at the top, the bottom bar connectingboth hangers at the bottom and means for drawing the hangers together toapply the shoes as and for the purpose specified.

9. The combination with the brake-shoes, brake-lever andconnecting-rods, of the sheaf secured to the axle and strap looselymounted on same and the cable connecting the strap to the brake-lever,the collar attached to or forming part of the sheaf, the loose collarmounted on same, the arc-shaped lever pivoted on the sheaf, providedwith a frictional contacting-surface, and designed to engage with thestrap, means connected to the loose collar for tilting the arc-shapedlever, the shoes, the hangers both pivotally connected to the shoes andone pivotally supported at the top, the bottom bar connecting bothhangers at the bottom, means for drawing the hangers together to applythe shoes and a suitable spring-actuated device for separating thehangers to release the shoes as and for the purpose specified.

1 0. The combination with the brake-shoes, brake-lever andconnecting-rods,of the sheaf secured to the axle, and strap looselymounted on same and the cable connecting the strap to the brake-lever,the collar attached toor forming part of the sheaf, the loose collarmounted on same, the arc-shaped lever pivoted on the sheaf and providedwith a fric tional contacting-surface anddesigned to en gage with thestrap, means connected to the loose collar for tilting the arc-shapedlever, means for retarding the rotation of the collar, the ratchet-Wheelformed on the face of the strap, the pawl engaging therewith and meansfor releasing'such pawl as and for the purpose specified.

11. Thecombination with the brake-shoes, brake-lever andconnecting-rods, of the sheaf secured to the axle, and the strap looselymounted on same and the cable connecting the strap to the brake-lever,the collar at tached to or forming part of the sheaf, the loose collarmounted on same, the arc-shaped lever pivoted on the sheaf provided witha frictional contact-surface, and designed to engage with. the strap,means connected to the loose collar for tiltingthe arc-shaped lever, theminor shoes,the hangers, the double bar forming a support for thepivoted hanger and a guide for the loose hanger,

means for connecting the hangers at the bottom and means for drawingsuch hangers together to apply the brake as and for the purposespecified.

JAMES HARRY KEIGHLY lIcOOLLUM.

Witnesses:

B. BOYD, WALTER 'I-I. ARMs.

